[llvm-bugs] [Bug 25291] New: clang crashes on valid code at -Os and above on x86_64-linux-gnu (in 64-bit mode)
via llvm-bugs
llvm-bugs at lists.llvm.org
Thu Oct 22 14:47:21 PDT 2015
https://llvm.org/bugs/show_bug.cgi?id=25291
Bug ID: 25291
Summary: clang crashes on valid code at -Os and above on
x86_64-linux-gnu (in 64-bit mode)
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangbugs at nondot.org
Reporter: su at cs.ucdavis.edu
CC: llvm-bugs at lists.llvm.org
Classification: Unclassified
The current clang trunk (as well as 3.6.x and 3.7.x) crashes when compiling the
following test case at -Os and above on x86_64-linux-gnu in the 64-bit mode
(but not in 32-bit mode).
This is a regression from 3.5.x.
$ clang-trunk -v
clang version 3.8.0 (trunk 250927)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/tools/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.2
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.1.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.1.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$
$ clang-trunk -m32 -Os -c small.c
$ clang-trunk -m64 -O1 -c small.c
$ clang-3.5 -m64 -Os -c small.c
$
$ clang-trunk -m64 -Os -c small.c
clang: /tmp/llvm/lib/IR/Value.cpp:354: void
llvm::Value::replaceAllUsesWith(llvm::Value *): Assertion `!contains(New, this)
&& "this->replaceAllUsesWith(expr(this)) is NOT valid!"' failed.
#0 0x2e701dd llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/local/clang-trunk/bin/clang+0x2e701dd)
#1 0x2e6f866 llvm::sys::RunSignalHandlers()
(/usr/local/clang-trunk/bin/clang+0x2e6f866)
#2 0x2e719fe (/usr/local/clang-trunk/bin/clang+0x2e719fe)
#3 0x7fb0332c9340 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)
#4 0x7fb032264cc9 gsignal
/build/buildd/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x7fb0322680d8 abort /build/buildd/eglibc-2.19/stdlib/abort.c:91:0
#6 0x7fb03225db86 __assert_fail_base
/build/buildd/eglibc-2.19/assert/assert.c:92:0
#7 0x7fb03225dc32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)
#8 0x2decc01 llvm::Value::replaceAllUsesWith(llvm::Value*)
(/usr/local/clang-trunk/bin/clang+0x2decc01)
#9 0x275c3e9 (/usr/local/clang-trunk/bin/clang+0x275c3e9)
#10 0x2759d95 (/usr/local/clang-trunk/bin/clang+0x2759d95)
#11 0x2dbf5f4 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/usr/local/clang-trunk/bin/clang+0x2dbf5f4)
#12 0x2a68688 (/usr/local/clang-trunk/bin/clang+0x2a68688)
#13 0x2dbfd15 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/usr/local/clang-trunk/bin/clang+0x2dbfd15)
#14 0x9ecaf3 clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions
const&, llvm::StringRef, llvm::Module*, clang::BackendAction,
llvm::raw_pwrite_stream*) (/usr/local/clang-trunk/bin/clang+0x9ecaf3)
#15 0x9cf0c3 (/usr/local/clang-trunk/bin/clang+0x9cf0c3)
#16 0xc5fb66 clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/clang-trunk/bin/clang+0xc5fb66)
#17 0x77e695 clang::FrontendAction::Execute()
(/usr/local/clang-trunk/bin/clang+0x77e695)
#18 0x74b10b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/clang-trunk/bin/clang+0x74b10b)
#19 0x72a82e clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/clang-trunk/bin/clang+0x72a82e)
#20 0x7208d3 cc1_main(llvm::ArrayRef<char const*>, char const*, void*)
(/usr/local/clang-trunk/bin/clang+0x7208d3)
#21 0x728e23 main (/usr/local/clang-trunk/bin/clang+0x728e23)
#22 0x7fb03224fec5 __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:321:0
#23 0x720369 _start (/usr/local/clang-trunk/bin/clang+0x720369)
Stack dump:
0. Program arguments: /usr/local/clang-trunk/bin/clang -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name small.c
-mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose
-mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64
-target-linker-version 2.24 -momit-leaf-frame-pointer -dwarf-column-info
-coverage-file /data2/small.c -resource-dir
/usr/local/clang-trunk/bin/../lib/clang/3.8.0 -internal-isystem
/usr/local/include -internal-isystem
/usr/local/clang-trunk/bin/../lib/clang/3.8.0/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -Os -fdebug-compilation-dir /data2
-ferror-limit 19 -fmessage-length 148 -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp
-o small.o -x c small.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'CallGraph Pass Manager' on module 'small.c'.
4. Running pass 'Global Value Numbering' on function '@fn1'
clang: error: unable to execute command: Aborted (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.8.0 (trunk 250927)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/tools/bin
clang: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and
associated run script.
clang: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/small-061fd2.c
clang: note: diagnostic msg: /tmp/small-061fd2.sh
clang: note: diagnostic msg:
********************
$
--------------------------------------
int printf (const char *, ...);
int a[1], b[1][1], c, d;
void
fn1 (int p1)
{
for (; d; d++)
goto lbl;
if (0)
lbl:
c--;
else
b[p1][0] = 0;
printf ("%d\n", a[p1]);
goto lbl;
}
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